This dataset Rice_MPSS_Blake was provided by Blake Meyers
http://mpss.udel.edu/rice/GeneQuery.php
There are totally 249990 signature sequences, out of which 104141 (41.7%) have been mapped to TIGR v4 pseudo-molecules correctly.

Total number of signature sequences: 249990 (145564 oligos are not mapped by Mayers and have starting position 0)
Total number of signature sequences with mapping position: 104427
Total number of signature sequences valiadated and loaded into database: 104141